Good Luck Rod and Mark
05-12-2008, 04:04 PM
#89
Please note that the engine would have made a LOT more power with the bigger turbo, but they reached the flow limit of the head, and it just flatlined at 831bhp (corrected) no matter what they did 
.
So THIS is why they called it a day and didn't bother trying the allegedly even better turbo (that and the required work to get it to fit, which following the results of the big turbo would have been pointless anyway).....
Any more power would have required a big valve head, which would have fucked up driveability for chasing another 80-100bhp (off gas power), and considering they're only going to put in 150ish bhp of NOS this time, I think that 800bhp is "adequate" and with the NOS, should see a genuine 1000bhp, which was always the goal anyway
.
215mph here they come!
Well done to all involved
. So THIS is why they called it a day and didn't bother trying the allegedly even better turbo (that and the required work to get it to fit, which following the results of the big turbo would have been pointless anyway).....
Any more power would have required a big valve head, which would have fucked up driveability for chasing another 80-100bhp (off gas power), and considering they're only going to put in 150ish bhp of NOS this time, I think that 800bhp is "adequate" and with the NOS, should see a genuine 1000bhp, which was always the goal anyway
.215mph here they come!
Well done to all involved
05-12-2008, 04:04 PM
#90
PassionFord Post Whore!!
Just got in, We had a very good day
It made 838.4hp@7570rpm and 666ftlb@6000rpm
It also made 561ftlb@4680rpm and 830hp@6990rpm
These are the GT4202 I havent got the GT4294 graphs with me
but Rod or chip will post them.
The head gasket is still intack and this was a conservative ignition map.
Mark
It made 838.4hp@7570rpm and 666ftlb@6000rpm
It also made 561ftlb@4680rpm and 830hp@6990rpm
These are the GT4202 I havent got the GT4294 graphs with me
but Rod or chip will post them.The head gasket is still intack and this was a conservative ignition map.
Mark
05-12-2008, 04:21 PM
#94
PassionFord Post Whore!!
Please note that the engine would have made a LOT more power with the bigger turbo, but they reached the flow limit of the head, and it just flatlined at 831bhp (corrected) no matter what they did .
So THIS is why they called it a day and didn't bother trying the allegedly even better turbo (that and the required work to get it to fit, which following the results of the big turbo would have been pointless anyway).....
Any more power would have required a big valve head, which would have fucked up driveability for chasing another 80-100bhp (off gas power), and considering they're only going to put in 150ish bhp of NOS this time, I think that 800bhp is "adequate" and with the NOS, should see a genuine 1000bhp, which was always the goal anyway.
215mph here they come!
Well done to all involved
. So THIS is why they called it a day and didn't bother trying the allegedly even better turbo (that and the required work to get it to fit, which following the results of the big turbo would have been pointless anyway).....
Any more power would have required a big valve head, which would have fucked up driveability for chasing another 80-100bhp (off gas power), and considering they're only going to put in 150ish bhp of NOS this time, I think that 800bhp is "adequate" and with the NOS, should see a genuine 1000bhp, which was always the goal anyway
.215mph here they come!
Well done to all involved
Correct, I still wanted Rods engine to be a daily driver
, I said it would make 800hp on the smaller turbo and 840hp on the larger one
it dont get much closer than that.Mark
05-12-2008, 04:24 PM
#97
Happily retired
hi
Great day, all went well & Mark played mega safe almost 10deg less ignition this time, we reached the limit of the ports/ex cam much as Mark
predicted & it was over 800bhp @ 6k & still over @ 8K . Peaked at 838.4 @ 7.5k it was out of puff.
The smaller turbo was still making power at 7.5k.
The big beastie was supplied with a full race exhaust housing that proved to be too tall & the turbo hit the head so game over.
600ft/lb from 4850 to 7350 should prove interesting.
Im calling it quits at this point, ive done my bit, but an easy 900bhp in there with larger ports & a different exhaust cam.
Will try the new turbo on the rolling road should spool quicker but it looks like the limit on 109 & conservative ignition.
Cheers Rod
ps. Chip has the graphs & i believe he will post them.
ned
Great day, all went well & Mark played mega safe almost 10deg less ignition this time, we reached the limit of the ports/ex cam much as Mark
predicted & it was over 800bhp @ 6k & still over @ 8K . Peaked at 838.4 @ 7.5k it was out of puff.
The smaller turbo was still making power at 7.5k.
The big beastie was supplied with a full race exhaust housing that proved to be too tall & the turbo hit the head so game over.
600ft/lb from 4850 to 7350 should prove interesting.
Im calling it quits at this point, ive done my bit, but an easy 900bhp in there with larger ports & a different exhaust cam.
Will try the new turbo on the rolling road should spool quicker but it looks like the limit on 109 & conservative ignition.
Cheers Rod
ps. Chip has the graphs & i believe he will post them.
ned
05-12-2008, 04:24 PM
#98
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Yes get that booked
We both want Yummy back, my car is getting boring to drive now And a well done for today, some pretty cool numbers, really cant wait to see it go !! If i get the chance that is !
05-12-2008, 04:24 PM
#99
Couple of screen shots of it running low boost while mark was just giving it a bit of a tickle to check the AFR's etc:
The final graph, this is the uncorrected one, 831bhp, corrected figure was 838, the reason they are so close is dyno temps were almost perfectly what it is looking for anyway, so less than 1% of correction was applied.
Engine sounded so strong and so happy with it.
The thing that really was amazing though, was before the run I asked Mark for his predictions of what power it would make, and to say what sort of ignition figures and boost figures he would be running, this is what he said:
2.8 Bar of boost
16 degrees of ignition
840bhp
Actual figures
2.8 Bar of boost
16 degrees of ignition
838.4bhp
No wonder he was so calm, he really did know EXACTLY what that engine was going to do!
The final graph, this is the uncorrected one, 831bhp, corrected figure was 838, the reason they are so close is dyno temps were almost perfectly what it is looking for anyway, so less than 1% of correction was applied.
Engine sounded so strong and so happy with it.
The thing that really was amazing though, was before the run I asked Mark for his predictions of what power it would make, and to say what sort of ignition figures and boost figures he would be running, this is what he said:
2.8 Bar of boost
16 degrees of ignition
840bhp
Actual figures
2.8 Bar of boost
16 degrees of ignition
838.4bhp
No wonder he was so calm, he really did know EXACTLY what that engine was going to do!
05-12-2008, 04:29 PM
#103
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05-12-2008, 04:34 PM
#107
over 400bhp in 1000rpm, mental how the power piles in when that big turbo spools up, you could easily map it to delivery more smoothly if you wanted though, as per the screen shots I posted just to show the sort of numbers it does on lower boost
Last edited by Chip; 05-12-2008 at 04:41 PM.
